HP LaserJet M1120 MFP Series. Service Manual

Transcription

1 HP LaserJet M1120 MFP Series Service Manual

2

3 HP LaserJet M1120 MFP Series Service Manual

4 Copyright and License 2008 Copyright Hewlett-Packard Development Company, L.P. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained herein is subject to change without notice. Trademark Credits Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated. Microsoft, Windows, and Windows NT are U.S. registered trademarks of Microsoft Corporation. UNIX is a registered trademark of The Open Group. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Edition 1, 1/2008 Part number: CB

5 Table of contents 1 Product information Quick access to product information... 2 Product comparison... 3 Product features... 4 Product walkaround... 5 Front view... 5 Back view... 5 Interface ports... 6 Serial number and model number location... 6 Software description... 7 Supported operating systems... 7 Supported printer drivers... 7 Software included with the product... 7 Easy installation for Windows... 7 Advanced installation... 8 Macintosh software... 8 Software for Windows... 9 Embedded Web server (network models only)... 9 Status Alerts software... 9 Other Windows components and utilities... 9 Software for Macintosh Embedded Web server (network models only) HP Director Uninstall software Windows Macintosh Media specifications Supported paper and print media sizes Supported paper types and tray capacity Installation Site preparations Operating environment Minimum system requirements What was in the box Install input devices Priority input tray Tray Install supplies ENWW iii

6 Install the print cartridge Maintenance Manage supplies Life expectancies of supplies Check and order supplies Store supplies Replace supplies Print cartridge HP policy on non-hp supplies HP fraud hotline Clean the product Clean the exterior Clean the flatbed scanner glass Clean the lid backing Clean the paper path Management tools Information pages Embedded Web server Features Operational theory Basic operation Sequence of operation for the base unit Scanner functions and operation Scanner functions Scanner operation Internal components (base unit) Engine control system Laser/scanner system Pickup/feed/delivery system Image-formation system Removal and replacement Removal and replacement strategy Introduction Removal and replacement warnings, cautions, notes, and tips Electrostatic discharge Required tools Before performing service After performing service Post-service tests Test 1 (print-quality test) Test 2 (copy-quality test) Parts removal order Scanner assembly Link assemblies and scanner support-frame spring Scanner lid Control-panel overlay iv ENWW

7 Control-panel assembly Scanner assembly Product base Print cartridge Separation pad Pickup roller Scanner cushions Media input tray Transfer roller Side covers Print-cartridge door Rear cover and fuser cover Front cover Formatter Power supply Scanner support frame Laser/scanner assembly Main motor Fuser Paper-pickup assembly Drive-gear assembly and drive belt Problem solve Problem-solving checklist Control-panel messages Alert and warning messages Alert and warning message tables Critical error messages Critical error message-tables Clear jams Causes of jams Where to look for jams Clear jams from the input-tray areas Clear jams from the output bin Clear jams from the print-cartridge area Avoid repeated jams Print problems Print-quality problems Improve print quality Print-quality settings Identify and correct print defects Print-quality checklist General print-quality issues Scan problems Solve scanned-image problems Scan-quality problems Prevent problems Solve scan-quality problems Copy problems Prevent problems ENWW v

8 Image problems Media-handling problems Performance problems Functional checks Engine test page Drum rotation test Half self-test functional check Perform a half self-test check Perform other checks Heating element check High-voltage contacts check Check the print-cartridge contacts Check the high-voltage connector assembly Service-mode functions NVRAM initialization Super NVRAM initialization Secondary service menu Problem-solving tools Product information pages and reports Configuration page Demo page Menu map Service menu Restore the factory-set defaults Clean the paper path Archive print Problem-solving diagrams Repetitive image defects Interface ports Formatter connectors ECU connectors Solenoid and motor Rollers Sensors Major components PCAs (base unit) Circuit diagram Firmware updates Parts Ordering information Supplies and hinge tool Cable and interface accessories Whole-unit replacement Control-panel overlays Supplementry documentation and support Parts lists and diagrams Types of screws Scanner assemblies Assemblies vi ENWW

9 External covers and panels Internal components (1 of 3) Internal components (2 of 3) Internal components (3 of 3) Alphabetical parts list Numerical parts list Appendix A Service and support Hewlett-Packard limited warranty statement Customer self repair warranty service Print cartridge limited warranty statement Customer support HP maintenance agreements Repacking the device Extended warranty Appendix B Specifications Physical specifications Electrical specifications Power consumption Environmental specifications Acoustic emissions Appendix C Regulatory information FCC compliance Environmental product stewardship program Protecting the environment Ozone production Power consumption Toner consumption Paper use Plastics HP LaserJet print supplies Return and recycling instructions United States and Puerto Rico Multiple returns (two to eight cartridges) Single returns Shipping Non-US returns Paper Material restrictions Disposal of waste equipment by users in private households in the European Union Material Safety Data Sheet (MSDS) For more information Declaration of conformity Safety statements Laser safety Canadian DOC regulations EMI statement (Korea) ENWW vii

10 Laser statement for Finland Substances table (China) Index viii ENWW

11 List of tables Table 1-1 Product guides... 2 Table 1-2 Supported paper and print media sizes Table 1-3 Supported envelopes and postcards Table 1-4 Supported paper types and tray capacity Table 4-1 Sequence of operation Table 4-2 Power-on sequence Table 6-1 Repetitive image defects Table 6-2 Formatter connectors Table 6-3 ECU connectors Table 6-4 Solenoid and motor Table 6-5 Rollers Table 6-6 Sensors Table 6-7 Major components Table 6-8 PCAs (base unit) Table 7-1 Whole-unit replacement, product bundle CC537A Table 7-2 Whole-unit replacement, product bundle CC459A Table 7-3 Control-panel overlays, HP LaserJet M Table 7-4 Control-panel overlays, HP LaserJet M1120n Table 7-5 Documentation (print on demand) Table 7-6 Scanner assemblies Table 7-7 Assemblies Table 7-8 External covers and panels Table 7-9 Internal components (1 of 3) Table 7-10 Internal components (2 of 3) Table 7-11 Internal components (3 of 3) Table 7-12 Alphabetical parts list Table 7-13 Numerical parts list Table B-1 Physical specifications Table B-2 Electrical specifications Table B-3 Power consumption (average, in watts) Table B-4 Environmental specifications Table B-5 Acoustic emissions Table C-1 有毒有害物质表 ENWW ix

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13 List of figures Figure 4-1 System block diagram Figure 4-2 Optical system (1 of 2) Figure 4-3 Optical system (2 of 2) Figure 4-4 Cross-section of printer Figure 4-5 Engine control system Figure 4-6 Engine-control-system circuit diagram Figure 4-7 Laser/scanner system Figure 4-8 Pickup/feed/delivery system Figure 4-9 Image-formation system Figure 4-10 Primary charging Figure 4-11 Developing Figure 4-12 Transfer Figure 4-13 Separation Figure 4-14 Fusing Figure 4-15 Drum cleaning Figure 5-1 Phillips and pozidrive screwdriver comparison Figure 5-2 Parts removal order Figure 5-3 Remove the link assemblies and scanner support-frame spring (1 of 4) Figure 5-4 Remove the link assemblies and scanner support-frame spring (2 of 4) Figure 5-5 Remove the link assemblies and scanner support-frame spring (3 of 4) Figure 5-6 Remove the link assemblies and scanner support-frame spring (4 of 4) Figure 5-7 Remove the scanner lid (1 of 2) Figure 5-8 Remove the scanner lid (2 of 2) Figure 5-9 Remove the control-panel overlay Figure 5-10 Remove the control-panel assembly (1 of 3) Figure 5-11 Remove the control-panel assembly (2 of 3) Figure 5-12 Remove the control-panel assembly (3 of 3) Figure 5-13 Remove the scanner assembly (1 of 10) Figure 5-14 Remove the scanner assembly (2 of 10) Figure 5-15 Remove the scanner assembly (3 of 10) Figure 5-16 Remove the scanner assembly (4 of 10) Figure 5-17 Remove the scanner assembly (5 of 10) Figure 5-18 Remove the scanner assembly (6 of 10) Figure 5-19 Remove the scanner assembly (7 of 10) Figure 5-20 Remove the scanner assembly (8 of 10) Figure 5-21 Remove the scanner assembly (9 of 10) Figure 5-22 Remove the scanner assembly (10 of 10) Figure 5-23 Remove the print cartridge (1 of 2) Figure 5-24 Remove the print cartridge (2 of 2) ENWW xi

14 Figure 5-25 Remove the separation pad (1 of 2) Figure 5-26 Remove the separation pad (2 of 2) Figure 5-27 Remove the pickup roller (1 of 5) Figure 5-28 Remove the pickup roller (2 of 5) Figure 5-29 Remove the pickup roller (3 of 5) Figure 5-30 Remove the pickup roller (4 of 5) Figure 5-31 Remove the pickup roller (5 of 5) Figure 5-32 Installing the scanner cushions Figure 5-33 Remove the media input tray (1 of 3) Figure 5-34 Remove the media input tray (2 of 3) Figure 5-35 Remove the media input tray (3 of 3) Figure 5-36 Remove the transfer roller Figure 5-37 Remove the side covers (1 of 4) Figure 5-38 Remove the side covers (2 of 4) Figure 5-39 Remove the side covers (3 of 4) Figure 5-40 Remove the side covers (4 of 4) Figure 5-41 Remove the print-cartridge door (1 of 2) Figure 5-42 Remove the print-cartridge door (2 of 2) Figure 5-43 Remove the rear cover and fuser cover (1 of 3) Figure 5-44 Remove the rear cover and fuser cover (2 of 3) Figure 5-45 Remove the rear cover and fuser cover (3 of 3) Figure 5-46 Remove the front cover (1 of 4) Figure 5-47 Remove the front cover (2 of 4) Figure 5-48 Remove the front cover (3 of 4) Figure 5-49 Remove the front cover (4 of 4) Figure 5-50 Remove the formatter Figure 5-51 Remove the power supply (1 of 7) Figure 5-52 Remove the power supply (2 of 7) Figure 5-53 Remove the power supply (3 of 7) Figure 5-54 Remove the power supply (4 of 7) Figure 5-55 Remove the power supply (5 of 7) Figure 5-56 Remove the power supply (7 of 7) Figure 5-57 Remove the power supply (7 of 7) Figure 5-58 Remove the scanner support frame (1 of 5) Figure 5-59 Remove the scanner support frame (2 of 5) Figure 5-60 Remove the scanner support frame (3 of 5) Figure 5-61 Remove the scanner support frame (4 of 5) Figure 5-62 Remove the scanner support frame (5 of 5) Figure 5-63 Remove the laser/scanner (1 of 7) Figure 5-64 Remove the laser/scanner (2 of 7) Figure 5-65 Remove the laser/scanner (3 of 7) Figure 5-66 Remove the laser/scanner (4 of 7) Figure 5-67 Remove the laser/scanner assembly (5 of 7) Figure 5-68 Remove the laser/scanner assembly (6 of 7) Figure 5-69 Remove the laser/scanner assembly (7 of 7) Figure 5-70 Remove the main motor (1 of 4) Figure 5-71 Remove the main motor (2 of 4) Figure 5-72 Remove the main motor (3 of 4) Figure 5-73 Remove the main motor (4 of 4) Figure 5-74 Remove the fuser (1 of 6) xii ENWW

15 Figure 5-75 Remove the fuser (2 of 6) Figure 5-76 Remove the fuser (3 of 6) Figure 5-77 Remove the fuser (4 of 6) Figure 5-78 Remove the fuser assembly (5 of 6) Figure 5-79 Remove the fuser assembly (6 of 6) Figure 5-80 Remove the paper-pickup assembly (1 of 4) Figure 5-81 Remove the paper-pickup assembly (2 of 4) Figure 5-82 Remove the paper-pickup assembly (3 of 4) Figure 5-83 Remove the paper-pickup assembly (4 of 4) Figure 5-84 Remove the drive-gear assembly and drive belt (1 of 4) Figure 5-85 Remove the drive-gear assembly and drive belt (2 of 4) Figure 5-86 Remove the drive-gear assembly and drive belt (3 of 4) Figure 5-87 Remove the Drive-gear assembly and drive belt (4 of 4) Figure 6-1 Print-cartridge high-voltage connection points (right side) Figure 6-2 Print-cartridge high-voltage connection points (left side) Figure 6-3 Formatter connectors Figure 6-4 ECU connectors Figure 6-5 Solenoid and motor Figure 6-6 Rollers Figure 6-7 Sensors Figure 6-8 Major components Figure 6-9 PCAs (base unit) Figure 6-10 Circuit diagram Figure 7-1 Scanner assemblies Figure 7-2 Assemblies Figure 7-3 External covers and panels Figure 7-4 Internal components (1 of 3) Figure 7-5 Internal components (2 of 3) Figure 7-6 Internal components (3 of 3) ENWW xiii

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17 1 Product information Quick access to product information Product comparison Product features Product walkaround Software description Software for Windows Software for Macintosh Uninstall software Media specifications ENWW 1

18 Quick access to product information Use the following Web site to find information about the product. Table 1-1 Product guides Guide HP LaserJet M1120 MFP Getting Started Guide HP LaserJet M1120 MFP Series User Guide Online Help Description Provides step-by-step instructions for installing and setting up the product. Provides detailed information for using the product and problem-solving. Available on the product CD or in Program Group if the software is installed on a computer. Provides information about options that are available in the printer drivers. To view a Help file, open the online Help through the printer driver. 2 Chapter 1 Product information ENWW

19 Product comparison The product is available in the following configurations. Base models Print letter-size pages at speeds up to 20 pages per minute (ppm) and A4-size pages at speeds up to 19 ppm. Priority input tray holds up to 10 sheets of print media. Tray 1 holds up to 250 sheets of print media or 10 envelopes. Network models Base model, plus: 10/100 Base-T Ethernet network port. IPv4 network protocol. IPv6 network protocol. Manual two-sided (duplex) printing and copying. Hi-Speed USB 2.0 port. 32-megabyte (MB) random-access memory (RAM). Flatbed scanner. ENWW Product comparison 3

20 Product features Print Prints letter-size pages at speeds up to 20 ppm and A4-size pages at speeds up to 19 ppm. Prints at 600 dots per inch (dpi) and FastRes 1200 dpi. Includes adjustable settings to optimize print quality. Copy Copies at 300 dots per inch (dpi). Memory Includes 32 MB RAM. Paper handling Priority input tray holds up to 10 pages. Tray 1 holds up to 250 sheets of print media or 10 envelopes. Output bin holds up to 100 sheets of print media. Scan Provides 1200 pixels per inch (ppi) full-color scanning. Printer driver features FastRes 1200 produces 1200-dots-per-inch (dpi) print quality for fast, high-quality printing of business text and graphics. Interface connections All models include a Hi-Speed USB 2.0 port. Network models include a 10/100 Base-T Ethernet network port. Economical printing Provides N-up printing (printing more than one page on a sheet). Provides an EconoMode setting, which uses less toner. Supplies Uses a print cartridge that has a no-shake design. The product ships with a 1,000-page (average yield) starter cartridge. The average yield for replacement cartridges is 2,000 pages. Accessibility Online user guide is compatible with text screen-readers. Print cartridges can be installed and removed by using one hand. All doors and covers can be opened by using one hand. 4 Chapter 1 Product information ENWW

21 Product walkaround Front view Scanner lid 2 Control panel 3 Print-cartridge door latch 4 Output bin 5 Priority input tray 6 Tray 1 Back view Interface ports 8 Power switch 9 Power connector ENWW Product walkaround 5

22 Interface ports All models have a Hi-Speed USB 2.0 port, and network models also have a 10/100 Base-T Ethernet port Hi-Speed USB 2.0 port 2 Ethernet port (network models only) Serial number and model number location The serial number and product model number label is on the rear of the product. 6 Chapter 1 Product information ENWW

23 Software description Supported operating systems The product supports the following operating systems: Full software installation Windows XP (32-bit) Windows Vista (32-bit) Windows 2000 Print and scan drivers only Windows XP (64-bit) Windows Vista (64-bit) Windows 2003 Server (64-bit) Windows 2003 Server (32-bit) Mac OS X v10.3, v10.4, and later NOTE: For Mac OS X v10.4 and later, PPC and Intel Core Processor Macs are supported. Supported printer drivers The product comes with software for Windows and Macintosh that allows the computer to communicate with the product. This software is called a printer driver. Printer drivers provide access to product features, such as printing on custom-sized paper, resizing documents, and inserting watermarks. NOTE: The most recent drivers are available at Depending on the configuration of Windows-based computers, the installation program for the product software automatically checks the computer for Internet access in order to obtain the latest drivers. Software included with the product There are several options for completing a recommended install. Easy installation will complete the installation with default settings. Advanced installation allows you to review the license agreements and the default settings. Easy installation for Windows HP drivers Printer driver Scan driver HP MFP software HP LaserJet Scan program Uninstall program HP Update program HP Customer Participation program ENWW Software description 7

24 Shop for HP Supplies program Other programs Advanced installation Readiris OCR (not installed with other software; separate installation is required) Advanced installation includes all of the features that are available with the easy installation. The HP Customer Participation program is optional. Macintosh software HP Product Setup Assistant HP Uninstaller HP LaserJet software HP Scan HP Director Scan to program HP Photosmart 8 Chapter 1 Product information ENWW

25 Software for Windows Embedded Web server (network models only) Network models are equipped with an embedded Web server, which provides access to information about device and network activities. This information appears in a Web browser, such as Microsoft Internet Explorer, Netscape Navigator, Apple Safari, or Firefox. The embedded Web server resides on the device. It is not loaded on a network server. The embedded Web server provides an interface to the device that anyone who has a networkconnected computer and a standard Web browser can use. No special software is installed or configured, but you must have a supported Web browser on your computer. To gain access to the embedded Web server, type the IP address for the device in the address line of the browser. (To find the IP address, print a configuration page.) Status Alerts software The Status Alerts software provides information about the current status of the product. The software also provides pop-up alerts when certain events occur, such as an empty tray or a problem with the product. The alert includes information about solving the problem. Other Windows components and utilities Software installer automates the printing system installation Online Web registration ENWW Software for Windows 9

26 Software for Macintosh Embedded Web server (network models only) HP Director Network models are equipped with an embedded Web server, which provides access to information about device and network activities. This information appears in a Web browser, such as Microsoft Internet Explorer, Netscape Navigator, Apple Safari, or Firefox. The embedded Web server resides on the device. It is not loaded on a network server. The embedded Web server provides an interface to the device that anyone who has a networkconnected computer and a standard Web browser can use. No special software is installed or configured, but you must have a supported Web browser on your computer. To gain access to the embedded Web server, type the IP address for the device in the address line of the browser. (To find the IP address, print a configuration page.) HP Director is a software program for working with documents. HP Director appears on the computer screen to initiate scanning, or to change settings on the product through Macintosh Configure Device. Also included is the HP product Setup Assistant, which sets up the print queue. 10 Chapter 1 Product information ENWW

27 Uninstall software Windows Macintosh 1. Click Start, and then click All Programs. 2. Click HP, and then click HP LaserJet M Click Uninstall, and then follow the onscreen instructions to remove the software. To remove the software, drag the PPD files to the trash can. ENWW Uninstall software 11

28 Media specifications Supported paper and print media sizes This product supports a number of paper sizes, and it adapts to various media. NOTE: printing. To obtain best print results, select the appropriate paper size and type in the print driver before Table 1-2 Supported paper and print media sizes Size Dimensions Priority input tray Tray 1 Letter 216 x 279 mm (8.5 x 11 in) Legal 216 x 356 mm (8.5 x 14 in) A4 210 x 297 mm (8.27 x in) Executive 184 x 267 mm (7.24 x in) A3 297 x 420 mm (11.69 x in) A5 148 x 210 mm (5.83 x 8.27 in) A6 105 x 148 mm (4.13 x 5.83 in) B5 (JIS) 182 x 257 mm (7.17 x in) 16k 197 x 273 mm (7.75 x in) 16k 195 x 270 mm (7.7 x 10.6 in) 16k 184 x 260 mm (7.25 x in) 8.5 x x 330 mm (8.5 x 13 in) 4 x x 152 mm (4 x 6 in) 5 x x 203 mm (5 x 8 in) 10 x 15 cm x 150 mm (3.9 x 5.9 in) Custom Priority input tray: Minimum 76 x 127 mm (3 x 5 in); Maximum 216 x 356 mm (8.5 x 14 in) 1 These sizes are supported as custom sizes. Table 1-3 Supported envelopes and postcards Size Dimensions Priority input tray Tray 1 Envelope # x 241 mm (4.13 x 9.49 in) Envelope DL 110 x 220 mm (4.33 x 8.66 in) 12 Chapter 1 Product information ENWW

29 Table 1-3 Supported envelopes and postcards (continued) Size Dimensions Priority input tray Tray 1 Envelope C5 162 x 229 mm (6.93 x 9.84 in) Envelope B5 176 x 250 mm (6.7 x 9.8 in) Envelope Monarch 98 x 191 mm (3.9 x 7.5 in) Postcard 100 x 148 mm (3.94 x 5.83 in) Double postcard 148 x 200 mm (5.83 x 7.87 in) Supported paper types and tray capacity This product has the following tray priority for feeding print media: 1. Priority input tray 2. Tray 1 Minimum media dimensions are 76 x 127 mm (3 x 5 in). Maximum media dimensions are 216 x 356 mm (8.5 x 14 in). To obtain the best print results, change the paper size and paper type settings in the printer driver before printing. Table 1-4 Supported paper types and tray capacity Type is Media specifications Priority input tray Tray 1 capacity 1 Plain 75 g/m 2 (20 lb) to 104 g/m 2 (27 lb) Up to 10 sheets Up to 250 sheets Color Preprinted Prepunched Recycled Light 60 g/m 2 (16 lb) to 75 g/m 2 (20 lb) Up to 10 sheets Up to 260 sheets Envelopes Less than 90 g/m 2 (24 lb) 1 envelope Up to 10 envelopes. Labels Standard 1 sheet Not supported. Bond 75 g/m 2 (20 lb) to 104 g/m 2 (27 lb) 1 sheet Up to 250 sheets Rough 75 g/m 2 (20 lb) to 104 g/m 2 (27 lb) 1 sheet Up to 200 sheets Transparencies 4 mm (0.1 in) Monochrome Overhead 1 sheet Up to 200 sheets. Heavy 110 g/m 2 (29 lb) to 125 g/m 2 (33 lb) Up to 10 sheets Not supported. Letterhead 75 g/m 2 (20 lb) to 104 g/m 2 (27 lb) Up to 10 sheets Up to 250 sheets 1 The maximum stack height for tray 1 is 25 mm (1 inch). ENWW Media specifications 13

30 14 Chapter 1 Product information ENWW

31 2 Installation Site preparations What was in the box Install input devices Install supplies ENWW 15

32 Site preparations Operating environment Place the product on a sturdy, level surface in a well-ventilated area. Make sure that the air vents are not blocked and that the product is installed away from direct sunlight, open flames, and ammonia fumes. Store or install the product in an area that meets the following requirements: Temperature (printer; operating) 15 o to 32.5 o C (59 o to 90.5 o F) Temperature (printer; storage) -20 o to 60 o C (-4 o to 140 o F) Humidity (printer; operating) 10% to 80% relative humidity (no condensation) Humidity (printer; storage) 10% to 90% relative humidity (no condensation) Temperature (toner cartridge; storage) -20 o to 40 o C (-4 o to 104 o F) Humidity (toner cartridge; storage) 10% to 90% relative humidity (no condensation) 16 Chapter 2 Installation ENWW

33 Minimum system requirements Windows 2000 Windows XP Windows Server 2003 Windows Vista Mac OS X v10.3 and later 128 MB RAM for Windows operating systems 32 MB RAM for Macintosh operating systems 250 MB hard-disk space (full installation) CD-ROM drive USB port ENWW Site preparations 17

34 What was in the box The following components are included in the box. NOTE: The USB and network cables are not included Item Description 1 HP LaserJet M1120 MFP 2 Print cartridge 3 Control-panel faceplate (if not already installed) 4 Output bin extension 5 Start guide and support flyer 6 CD-ROMs (software and online user guide) 7 Power cord 8 Tray 1 18 Chapter 2 Installation ENWW

35 Install input devices Priority input tray The priority input tray is accessed from the front of the product. The product prints from the priority input tray before attempting to print from tray 1. Media guides ensure that the media is correctly fed into the product and that the print is not skewed (crooked on the media). When loading media, adjust the media guides to match the width of the media that you are using. ENWW Install input devices 19

36 Tray 1 1. Push tray 1 into the product. 2. Open the tray cover, and then adjust the media guides out. 3. Load the paper in the tray, snug the media guides against the stack, and then close the tray cover. 20 Chapter 2 Installation ENWW

37 Install supplies Install the print cartridge 1. Open the print-cartridge door. 2. Remove the new print cartridge from its packaging, and then rock the print cartridge back and forth. 3. Remove the orange cover from the print cartridge, and then pull the orange tab straight out to remove the sealing tape. ENWW Install supplies 21

38 4. Insert the cartridge into the product until it is firmly in place. 5. Close the print-cartridge door. 22 Chapter 2 Installation ENWW

39 3 Maintenance Manage supplies Clean the product Management tools ENWW 23

40 Manage supplies Inspect any parts that wear when servicing the product. Replace them as needed, based on failure or wear rather than usage. The following table lists approximate schedules for replacing consumables. Life expectancies of supplies Item HP LaserJet M1120 MFP Series Print cartridge Capacity Recommended maximum of 3,000 pages per month 2,000 pages 1 (standard) 1 For information about the yield for the cartridges, see Actual yield depends on specific use. Check and order supplies Hewlett-Packard recommends that you place an order for a replacement print cartridge when the Low message for a print cartridge first appears. Use a new, authentic HP print cartridge to obtain the following types of supplies information: Amount of cartridge life remaining Estimated number of pages remaining Number of pages printed Other supplies information Store supplies Follow these guidelines for storing print cartridges: Do not remove the print cartridge from its package until you are ready to use it. CAUTION: minutes. To prevent damage, do not expose the print cartridge to light for more than a few See Environmental specifications on page 187 for operating and storage temperature ranges. Store the supply in a horizontal position. Store the supply in a dark, dry location away from heat and magnetic sources. 24 Chapter 3 Maintenance ENWW

41 Replace supplies Print cartridge 1. Open the print-cartridge door. 2. Grasp the handle on the print cartridge, and then pull the cartridge straight out to remove it. See the recycling information inside the print cartridge box. 3. Remove the new print cartridge from its packaging, and then rock the print cartridge back and forth. ENWW Manage supplies 25

42 4. Remove the orange cover from the print cartridge, and then pull the orange tab straight out to remove the sealing tape. 5. Insert the cartridge into the product until it is firmly in place. 6. Close the print-cartridge door. CAUTION: If toner gets on any clothing, wipe it off with a dry cloth and wash the clothing in cold water. Hot water sets toner into the fabric. HP policy on non-hp supplies Hewlett-Packard Company cannot recommend the use of non-hp supplies, either new or remanufactured. Because they are not HP products, HP cannot influence their design or control their quality. Service or repairs required as a result of using a non-hp supply will not be covered under the warranty. 26 Chapter 3 Maintenance ENWW

43 HP fraud hotline Call the HP fraud hotline if the product indicates that the print cartridge is not an HP print cartridge and you think that it is genuine. HP will help determine if the product is genuine and take steps to resolve the problem. The print cartridge might not be a genuine HP one if you notice the following issues: You are experiencing a large number of problems with the print cartridge. The print cartridge does not look like it usually does (for example, the pull tab or the box is different). In the United States, call toll-free: Outside the United States, you can call collect. Dial the operator and ask to place a collect call to this telephone number: If you do not speak English, a representative at the HP fraud hotline who speaks your language will assist you. Or, if someone who speaks your language is not available, a language line interpreter will connect approximately one minute after the beginning of the call. The language line interpreter is a service that will translate between you and the representative for the HP fraud hotline. ENWW Manage supplies 27

44 Clean the product Clean the exterior Use a soft, damp, lint-free cloth to wipe dust, smudges, and stains off of the exterior of the product. Clean the flatbed scanner glass Dirty glass, from fingerprints, smudges, hair, and so on, slows down performance and affects the accuracy of special features such as fit-to-page and copy. 1. Turn off the product, unplug the power cord from the electrical outlet, and raise the scanner cover. 2. Clean the glass by using a soft cloth or sponge that has been moistened with nonabrasive glass cleaner. CAUTION: Do not use abrasives, acetone, benzene, ammonia, ethyl alcohol, or carbon tetrachloride on any part of the product; these can damage the product. Do not place liquids directly on the glass. They might seep under it and damage the product. Clean the lid backing Minor debris can accumulate on the white document lid backing that is located underneath the product lid. 1. Turn off the product, unplug the power cord, and raise the lid. 2. Clean the white document lid backing by using a soft cloth or sponge that has been moistened with a mild soap and warm water. Wash the backing gently to loosen debris; do not scrub the backing. 28 Chapter 3 Maintenance ENWW

45 3. Dry the backing by using a chamois or soft cloth. CAUTION: Do not use paper-based wipes because they might scratch the backing. 4. If this does not clean the backing well enough, repeat the previous steps and use isopropyl alcohol to dampen the cloth or sponge, and then wipe the backing thoroughly with a damp cloth to remove any residual alcohol. Clean the paper path During the printing process, paper, toner, and dust particles can accumulate inside the product. Over time, this buildup can cause print-quality problems such as toner specks or smearing. This product has a cleaning mode that can correct and prevent these types of problems. Specks Smearing 1. Press Setup. 2. Use the arrow buttons to find the Service menu, and then press OK. 3. Use the arrow buttons to find Cleaning mode, and then press OK. 4. Load plain letter or A4 paper when you are prompted. 5. Press OK again to confirm and begin the cleaning process. A page feeds through the product slowly. Discard the page when the process is completed. ENWW Clean the product 29

46 Management tools Information pages Information pages reside within the product memory. These pages help diagnose and solve problems with the product. NOTE: If the product language was not correctly set during installation, you can set the language manually so the information pages print in one of the supported languages. Change the language by using the System setup menu on the control panel or the embedded Web server (network models only). Page description Demo page Contains examples of text and graphics. How to print the page 1. On the product control panel, press Setup. 2. Use the arrow buttons to select Reports, and then press OK. 3. Use the arrow buttons to select Demo page, and then press OK. Menu map Shows the control-panel menus and available settings. 1. On the product control panel, press Setup. 2. Use the arrow buttons to select Reports, and then press OK. 3. Use the arrow buttons to select Menu structure, and then press OK. Configuration page Shows the current settings and product properties. 1. On the product control panel, press Setup. 2. Use the arrow buttons to select Reports, and then press OK. 3. Use the arrow buttons to select Config report, and then press OK. Embedded Web server This product is equipped with an embedded Web server (EWS), which provides access to information about product and network activities. A Web server provides an environment in which web programs may run, much in the same way that an operating system, such as Windows, provides an environment for programs to run on a computer. The output from these programs can then be displayed by a Web browser, such as Microsoft Internet Explorer, Safari, or Netscape Navigator. An embedded Web server resides on a hardware device (such as an HP LaserJet product) or in firmware, rather than as software that is loaded on a network server. The advantage of an EWS is that it provides an interface to the product that anyone with a networkconnected product and computer can use. There is no special software to install or configure, but you must have a supported Web browser on the computer. To gain access to the EWS, type the IP address for the product in the address line of the browser. (To find the IP address, print a configuration page.) NOTE: For Macintosh operating systems, you can use the EWS over a USB connection after installing the Macintosh software included with the product. 30 Chapter 3 Maintenance ENWW

47 Features The EWS allows you to view product and network status and manage printing functions from a computer. With the EWS, you can complete the following tasks: View product status information Determine the remaining life on all supplies and order new ones View and change part of the product configuration View and print some internal pages Select the language in which to display the EWS pages View and change network configuration Set, change, or clear the product security password NOTE: Changing network settings in the EWS might disable some of product software or features. ENWW Management tools 31

48 32 Chapter 3 Maintenance ENWW

49 4 Operational theory Basic operation Scanner functions and operation Internal components (base unit) Engine control system Laser/scanner system Pickup/feed/delivery system Image-formation system ENWW 33

50 Basic operation This chapter presents an overview of the relationships between major components in the product, and includes a detailed discussion of the image-formation system. The following systems are discussed: Engine control system Laser/scanner system Pickup/feed/delivery system Image-formation system Figure 4-1 System block diagram Sequence of operation for the base unit Operational sequences are controlled by the microprocessor on the DC controller. Table 4-1 Sequence of operation Name Timing Purpose WAIT STBY (standby) INTR (initial rotation) From power-on until the end of the main-motor initial drive From the end of the WAIT or LSTR period until either a print command is sent from the formatter or the power is turned off From the time of the print command until the pickup solenoid is turned on Detects the presence of a print cartridge; clears potential from the drum surface and cleans the transfer roller Prepares the product to receive print commands Prepares the photosensitive drum for printing 34 Chapter 4 Operational theory ENWW

51 Table 4-1 Sequence of operation (continued) Name Timing Purpose PRINT LSTR (last rotation) From the end of the INTR period until the primary high-voltage is turned off From the end of the PRINT period (when high-voltage is turned off) until the main motor stops rotating Forms the image on the photosensitive drum and transfers the toner image to the media Delivers the last page of a print job After LSTR, the product either returns to STBY or, if another print command was sent from the formatter, enters INTR. Table 4-2 Power-on sequence Step Action 1 Power-on 2 CPU initialization 3 Start video interface communication 4 Check sensors for residual media 5 Main motor initial drive 6 Fuser heater initial drive. The fuser heater reaches a surface temperature of 100 o C. 7 Laser/scanner motor initial drive 8 High-voltage control Detect presence of a print cartridge Clean the transfer roller after the primary charging AC bias is turned on 9 Failure/abnormality check: detect laser/scanner failure, fuser failure, and open covers 10 Communication with the memory tag ENWW Basic operation 35

52 Scanner functions and operation The following sections describe how the document scanner functions. Scanner functions The contact image sensor (CIS) is the major component of the optical scanning system. The CIS consists of three LEDs (red, green, and blue), a light guide, the scanning glass, the rod lens array, and a sensor array. When the CIS scans a document, the CIS moves and the paper is stationary. Figure 4-2 Optical system (1 of 2) The formatter controls the CIS. To begin scanning, the formatter sends a signal to the CIS. The LEDs illuminate and the light passes through the light guide and scanning glass and strikes the document. Light that the document reflects passes back through the scanning glass and rod lens array into the sensor array. The sensor array consists of 5,148 photosensors (468 photosensors on each of 11 sensor driver circuits). The sensor array collects and amplifies the reflected light and converts it into serial data in the driver circuits. The CIS sends the data to the formatter for image formation. 36 Chapter 4 Operational theory ENWW

53 Figure 4-3 Optical system (2 of 2) Scanner operation At startup and periodically at other times, the scanner assembly moves systematically to locate its home position. It then calibrates to a white strip located under the glass at the right end of the scan tub. ENWW Scanner functions and operation 37

54 Internal components (base unit) Figure 4-4 Cross-section of printer Fuser unit 2 Pressure roller 3 Fuser sleeve 4 Delivery roller 5 Laser/scanner unit 6 Single-sheet-feed slot 7 Multi-purpose tray 8 Photosensitive drum 9 Pickup roller 10 Separation pad 11 Feed roller 12 Transfer roller 38 Chapter 4 Operational theory ENWW

55 Engine control system The engine control system coordinates all of the product functions, according to commands sent from the formatter. It drives the laser/scanner system, the image-formation system, and the pickup/feed/ delivery system. The engine control system contains the following components: DC controller Low-voltage power supply High-voltage power supply Fusing control Figure 4-5 Engine control system ENGINE CONTROL SYSTEM DC controller LASER/SCANNER SYSTEM Low-voltage power supply Formatter IMAGE-FORMATION SYSTEM High-voltage power supply PICKUP-AND-FEED SYSTEM Fixing control ENWW Engine control system 39

56 Figure 4-6 Engine-control-system circuit diagram Engine controller Fixing unit Fixing control M Motor AC input Transfer roller Cartridge Low-voltage power supply High-voltage power supply DC controller Solenoid Sensor Switch Formatter Laser/scanner unit 40 Chapter 4 Operational theory ENWW

57 Laser/scanner system The laser/scanner system receives video signals from the DC controller and the formatter, and then converts the signals into latent images on the photosensitive drum. Figure 4-7 Laser/scanner system ENWW Laser/scanner system 41

58 Pickup/feed/delivery system The pickup/feed/delivery system consists of several types of feed rollers and sensors. The DC controller uses two motors and two solenoids to drive the rollers. Three media-detection sensors detect media as it passes through the printer. If media does not reach or pass each sensor within a specified time period, the DC controller determines that a jam has occurred and alerts the formatter. The following components are identified in Figure 4-8 Pickup/feed/delivery system on page 42: M1, main motor SL1, pickup solenoid PS701, fuser-delivery sensor PS702, media-width sensor PS751, top-of-page sensor Figure 4-8 Pickup/feed/delivery system Pressure roller Feed roller PS702 PS701 Fuser sleeve Photosensitive drum M1 Transfer roller PS751 Pickup roller Single-sheet-feed tray SL1 Multi-purpose tray Separation pad 42 Chapter 4 Operational theory ENWW

59 Image-formation system Laser printing requires the interaction of several technologies, including electronics, optics, and electrophotographics, to produce a printed page. Each process functions independently and must be coordinated with the other product processes. Image formation consists of the following five processes: Electrostatic latent-image formation Developing Transfer Fusing Drum cleaning These five processes contain seven steps, which are shown in Figure 4-9 Image-formation system on page 43 and described in the following sections. Figure 4-9 Image-formation system Step 1: Primary charging DC and AC biases are applied to the primary charging roller, which transfers a uniform negative potential to the photosensitive drum. Figure 4-10 Primary charging ENWW Image-formation system 43

60 Step 2: Laser beam exposure The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum. An electrostatic latent image is formed on the drum where negative charges were neutralized. Step 3: Developing The developing cylinder comes in contact with the photosensitive drum to deposit toner onto the electrostatic latent image. NOTE: The charges on the exposed area of the drum are shown as positive in Figure 4-11 Developing on page 44. The charges are actually negative, but they are more positive than the charges on the developing cylinder. Figure 4-11 Developing Toner acquires a negative charge through friction from the developing cylinder and the blade. When the negatively charged toner comes in contact with the drum, the toner adheres to the electrostatic latent image. The image on the drum becomes visible because of the toner. Step 4: Transfer The transfer charging roller, to which a DC positive bias is applied, imparts a positive charge on the print media. When the print media comes in contact with the photosensitive drum, the toner is transferred to the print media. 44 Chapter 4 Operational theory ENWW

61 Figure 4-12 Transfer Step 5: Separation The elasticity of the print media causes its separation from the photosensitive drum. A static-charge eliminator aids separation by weakening any electrostatic adhesion. Figure 4-13 Separation Step 6: Fusing The DC negative bias applied to the fusing film strengthens the holding force of the toner on the print media and prevents the toner from scattering. ENWW Image-formation system 45

62 Figure 4-14 Fusing Step 7: Drum cleaning The cleaning blade scrapes the residual toner off of the photosensitive drum and deposits it into the waste-toner case. Figure 4-15 Drum cleaning 46 Chapter 4 Operational theory ENWW

63 5 Removal and replacement Removal and replacement strategy Scanner assembly Product base ENWW 47

64 Removal and replacement strategy Introduction Introduction Before performing service After performing service Post-service tests Parts removal order This chapter documents the removal and replacement of field-replaceable units (FRUs) only. Replacing FRUs is generally the reverse of removal. Occasionally, notes and tips are included to provide directions for difficult or critical replacement procedures. HP does not support the repairing of individual subassemblies or troubleshooting at the component level. Note the length, diameter, color, type, and location of each screw. Be sure to return each screw to its original location during reassembly. Incorrectly routed or loose wire harnesses can interfere with other internal components and can become damaged or broken. Frayed or pinched harness wires can be difficult to locate. When replacing wire harnesses, always use the provided wire loops, lance points, or wire-harness guides. Removal and replacement warnings, cautions, notes, and tips WARNING! Turn the product off, wait 5 seconds, and then remove the power cord before attempting to service the product. If this warning is not followed, severe injury can result, as well as damage to the product. The power must be on for certain functional checks during problem solving. However, the power supply should be disconnected during parts removal. Never operate or service the product with the protective cover removed from the laser/scanner assembly. The invisible reflected beam can damage your eyes. Sheet-metal and plastic edges in the product can be sharp. Use caution when servicing this product. CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do not straighten pre-folds in the FFCs. You must make sure that all FFCs are fully seated in their connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA. NOTE: Your product might not appear exactly as the one shown in the photos in this chapter. For example, the color of the external panels and covers might be different than your product. However, this does not affect the validity of the procedures in this chapter. TIP: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread pattern, and then carefully turn it clockwise to tighten. Do not overtighten. 48 Chapter 5 Removal and replacement ENWW

65 Electrostatic discharge Required tools CAUTION: The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at ESD-protected workstation. If an ESD-protected workstation is not available, discharge body static by grasping the print engine chassis before touching an ESDsensitive component. Ground the print engine chassis before servicing the product. #2 Phillips screwdriver with magnetic tip Small flat-blade screwdriver Long flat-blade screwdriver Needle-nose pliers ESD mat (if one is available) Penlight (optional) CAUTION: Always use a Phillips screwdriver (callout 1). Do not use a pozidrive screwdriver (callout 2) or any motorized screwdriver. These can damage screws or screw threads. Do not pull directly on the wires to disconnect them. Always pull on the plastic body of a connector to avoid damaging the connector wires. Figure 5-1 Phillips and pozidrive screwdriver comparison Before performing service If possible, print a configuration page (to record customer settings) and menu map report. See Information pages on page 30. Remove all media from the product and remove the input tray. Turn off the power by using the power switch. Unplug the power and interface cables. ENWW Removal and replacement strategy 49

66 Place the product on an ESD mat, if one is available. If an ESD-protected workstation is not available, discharge body static and ground the print engine chassis before touching an ESDsensitive part. Remove the print cartridge. See Print cartridge on page 25. After performing service Replace the print cartridge and input tray. Reload the input tray with media. Perform the post-service tests. See Post-service tests on page Chapter 5 Removal and replacement ENWW

67 Post-service tests After service has been completed, the following tests can be used to verify that the repair or replacement was successful. Test 1 (print-quality test) 1. Verify that you have completed the necessary reassembly steps. 2. Ensure that the input tray contains clean, unmarked paper. 3. Attach the power cord and interface cable, and then turn on the product. 4. Verify that the expected start-up sounds occur. 5. Print a configuration page, and then verify that the expected printing sounds occur. 6. Print a demo page, and then verify that the print quality is as expected. 7. Send a print job from the host computer, and then verify that the output meets expectations. 8. If necessary, restore any customer product settings. 9. Clean the outside of the product with a damp cloth. Test 2 (copy-quality test) 1. Verify that you have completed the necessary reassembly steps. 2. Ensure that the input tray contains clean, unmarked paper. 3. Attach the power cord and interface cable, and then turn on the product. 4. Verify that the expected start-up sounds occur. 5. Print a configuration page, and then verify that the expected printing sounds occur. 6. Place the configuration page on the scanner glass. 7. Print a copy job, and then verify the results. 8. Clean the outside of the product with a damp cloth. ENWW Removal and replacement strategy 51

68 Parts removal order Use the following diagrams to determine which parts of the product must be removed before servicing. NOTE: The scanner assembly might be contaminated if it is opened outside of a cleanroom environment. For this reason, the entire scanner assembly is replaceable only as a unit. Replacing the scanner assembly as an entire assembly replaces the scan module, the scan motor, and the cable. Figure 5-2 Parts removal order Flatbed lid Flatbed lid Flatbed lid white plate Link assemblies and scanner support-frame springs Control-panel overlay Control-panel assembly Pr int car tr idge Tr ansf er rolle r Media input tr ay Pr inter side co ve rs Rear co ve r and fuser co ve r Po wer suppl y Scanner assembly Pr int-car tr idge door Fr ont co ve r Scanner suppor t-frame Engine controller uni t Laser/scanner assembly Main motor Fuser assembly Pic kup assembly Fr ont co ve r Formatter 52 Chapter 5 Removal and replacement ENWW

69 Scanner assembly NOTE: Your product might not appear exactly as the one shown in the photos in this chapter. For example, the color of the external panels and covers might be different than your product. However, this does not affect the validity of the procedures in this chapter. Link assemblies and scanner support-frame spring 1. Push the print-cartridge access button and raise the scanner assembly until it is locked open. 2. Use a small flat-blade screwdriver to release the link tabs on each link assembly. WARNING! When the link assemblies are disengaged, the scanner assembly can easily fall off of the product base if it is rotated too far towards the back of the product. CAUTION: Do not push too hard on the link tabs or the tabs might break. Figure 5-3 Remove the link assemblies and scanner support-frame spring (1 of 4) ENWW Scanner assembly 53

70 3. Rotate a link assembly toward the front of the product until the link disengages from the scanner support frame. Figure 5-4 Remove the link assemblies and scanner support-frame spring (2 of 4) 4. Remove the link assembly. Repeat these steps to remove the remaining link. Figure 5-5 Remove the link assemblies and scanner support-frame spring (3 of 4) 54 Chapter 5 Removal and replacement ENWW

71 5. Use needle-nose pliers to remove the scanner support-frame spring. Figure 5-6 Remove the link assemblies and scanner support-frame spring (4 of 4) ENWW Scanner assembly 55

72 Scanner lid 1. Open the scanner lid. Figure 5-7 Remove the scanner lid (1 of 2) 2. Lift the scanner lid straight up to remove it from the scanner assembly. CAUTION: Avoid touching the flatbed glass. Skin oils and fingerprints can contaminate the glass and cause print-quality problems. Figure 5-8 Remove the scanner lid (2 of 2) 56 Chapter 5 Removal and replacement ENWW

73 Control-panel overlay Carefully pry the outside edge of the control-panel overlay away from the product to remove it. CAUTION: Be careful to not damage the overlay if it will be reinstalled after servicing the device. TIP: When installing a replacement control-panel overlay, you can dispose of the barcode part-number portion of the replacement overlay. Figure 5-9 Remove the control-panel overlay ENWW Scanner assembly 57

74 Control-panel assembly CAUTION: The control-panel is an ESD-sensitive component. 1. Remove the control-panel overlay. See Control-panel overlay on page Remove one screw (callout 1). Figure 5-10 Remove the control-panel assembly (1 of 3) 1 3. Slide the control panel forward and slightly lift up the control panel. Figure 5-11 Remove the control-panel assembly (2 of 3) 58 Chapter 5 Removal and replacement ENWW

75 4. Disconnect one FFC (callout 2). Remove the control-panel assembly. CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process. Figure 5-12 Remove the control-panel assembly (3 of 3) 2 ENWW Scanner assembly 59

76 Scanner assembly CAUTION: Avoid touching the flatbed glass. Skin oils and fingerprints can contaminate the glass or pad and cause print-quality or paper-pickup problems. 1. Remove one screw (callout 1). Figure 5-13 Remove the scanner assembly (1 of 10) 1 2. Release one tab on the back side of the cover. Figure 5-14 Remove the scanner assembly (2 of 10) 60 Chapter 5 Removal and replacement ENWW

77 3. Release the bottom tab (callout 2). Figure 5-15 Remove the scanner assembly (3 of 10) 2 4. Rotate the back side of the cover away from the product, and then slide the cover toward the front of the product to remove it. Figure 5-16 Remove the scanner assembly (4 of 10) 1 2 ENWW Scanner assembly 61

78 5. Push the print-cartridge door button to release the scanner assembly, and then raise the assembly until it locks open. Figure 5-17 Remove the scanner assembly (5 of 10) 6. Disconnect two FFCs (callout 3; J10 and J12) on the formatter. Remove one FFC from the ferrite (callout 4). TIP: It might be easier to thread the FFC through the ferrite by removing one screw and the ferrite (callout 4). The ferrite is not captive in the bracket and can be dislodged when you remove the bracket. Figure 5-18 Remove the scanner assembly (6 of 10) Chapter 5 Removal and replacement ENWW

79 7. Grasp the tab on the gear-drive arm bracket and carefully flex it away from the scanner assembly to release the bracket. Figure 5-19 Remove the scanner assembly (7 of 10) 8. Push the bracket toward the right side of the product until its mounting tabs clear the holes in the scanner assembly. Figure 5-20 Remove the scanner assembly (8 of 10) ENWW Scanner assembly 63

80 9. Use a small flat-blade screwdriver to release the tabs on each link assembly. WARNING! When the links are disengaged, the scanner assembly can easily fall off of the product base if it is rotated too far toward the back of the product. CAUTION: Do not push too hard on the link tabs or the tabs might break. Figure 5-21 Remove the scanner assembly (9 of 10) 10. Rotate the scanner assembly toward the rear of the product until the rear hinges clear the chassis hinge pins. Lift the scanner assembly off of the product base. CAUTION: Make sure that the scanner lid is supported so that it does not swing open when you remove the scanner assembly. NOTE: Do not lose the two scanner cushions in the scanner support-frame corners when moving the product base. See Scanner cushions on page 70. Figure 5-22 Remove the scanner assembly (10 of 10) 64 Chapter 5 Removal and replacement ENWW

81 Product base NOTE: Your product might not appear exactly as the one shown in the photos in this chapter. For example, the color of the external panels and covers might be different than your product. However, this does not affect the validity of the procedures in this chapter. Print cartridge CAUTION: To prevent damage, do not expose the print cartridge to direct or bright light. Cover it with a piece of paper. 1. Push the print-cartridge-door release button and raise the scanner assembly until it locks open. Figure 5-23 Remove the print cartridge (1 of 2) 2. Pull the print cartridge up and out of the product. Figure 5-24 Remove the print cartridge (2 of 2) ENWW Product base 65

82 Separation pad 1. Position the product with the rear side facing you. 2. Support the product and tip it forward. Remove two screws (callout 1). Figure 5-25 Remove the separation pad (1 of 2) 1 3. Remove the separation pad and frame. Figure 5-26 Remove the separation pad (2 of 2) 66 Chapter 5 Removal and replacement ENWW

83 Pickup roller 1. Remove the print cartridge and locate the pickup roller. See Print cartridge on page 65. Figure 5-27 Remove the pickup roller (1 of 5) 2. Gently release the small, white tabs on each side of the pickup roller by pushing them away from the roller, and then rotate the roller away from the mounting frame. CAUTION: Do not touch the black-sponge transfer roller inside the product. Touching the transfer roller can damage the product. Use gentle pressure to release the small white tabs to avoid breaking them. Figure 5-28 Remove the pickup roller (2 of 5) ENWW Product base 67

84 3. Gently pull the roller up and out of the product. Figure 5-29 Remove the pickup roller (3 of 5) 4. Circular and rectangular pegs on each side of the pickup roller fit into corresponding slots on the pickup-roller mounting frame and prevent the roller from being incorrectly installed. Position the replacement pickup roller in the slots on the pickup-roller frame. Figure 5-30 Remove the pickup roller (4 of 5) 68 Chapter 5 Removal and replacement ENWW

85 5. Rotate the top of the pickup roller into position until the white tabs on each side of the roller snap into place. Figure 5-31 Remove the pickup roller (5 of 5) ENWW Product base 69

86 Scanner cushions 1. Open the print-cartridge door. 2. Place a scanner cushion in each well on the scanner support frame (callout 1). Use the eraser-end of a pencil or use an ink pen with the cap on to seat each cushion in its well. Figure 5-32 Installing the scanner cushions 1 70 Chapter 5 Removal and replacement ENWW

87 Media input tray 1. Open the media input tray lid. Figure 5-33 Remove the media input tray (1 of 3) 2. Slide the adjustable media guides to the center of the tray. Figure 5-34 Remove the media input tray (2 of 3) ENWW Product base 71

88 3. Depress the pickup-tray locking tabs to release the media input tray, and then pull it out and away from the product. Figure 5-35 Remove the media input tray (3 of 3) 72 Chapter 5 Removal and replacement ENWW

89 Transfer roller CAUTION: Do not touch the black-sponge portion of the transfer roller. Skin oils deposited on the transfer roller might cause print-quality problems. 1. Open the print-cartridge door and remove the print cartridge. 2. Release the two small tabs on the transfer roller and then slide the roller to the right to release the left end of the roller shaft. Remove the transfer roller. Figure 5-36 Remove the transfer roller ENWW Product base 73

90 Side covers NOTE: The procedure for removing the right-side and left-side covers is identical. The right-side cover is shown in the following procedure. 1. Remove one screw (callout 1). Callout 2 is the left-side cover screw. Figure 5-37 Remove the side covers (1 of 4) Release the locking tab on the back of the cover. Figure 5-38 Remove the side covers (2 of 4) 74 Chapter 5 Removal and replacement ENWW

91 3. Release the bottom tab (callout 3). Figure 5-39 Remove the side covers (3 of 4) 3 4. Slightly rotate the back side of the right cover away from the product, and then slide it toward the front of the product to release it. Figure 5-40 Remove the side covers (4 of 4) 2 1 ENWW Product base 75

92 Print-cartridge door 1. Remove the scanner assembly. See Scanner assembly on page Fully open the print-cartridge door and gently pull downward on both print-cartridge swing arms to release them. (In Figure 5-41 Remove the print-cartridge door (1 of 2) on page 76, the left arm is disengaged). CAUTION: Be careful when releasing the swing arms. They can easily break. Figure 5-41 Remove the print-cartridge door (1 of 2) 3. Rotate the door toward the back of the product and then lift it up and off of the product. Figure 5-42 Remove the print-cartridge door (2 of 2) 76 Chapter 5 Removal and replacement ENWW

93 Rear cover and fuser cover 1. Remove the right-side and left-side covers. See Side covers on page Remove one screw (callout 1). Figure 5-43 Remove the rear cover and fuser cover (1 of 3) 1 3. Release the two rear-cover locking tabs (callout 2). Rotate the bottom of the rear cover up and away from the product, and then remove it. Figure 5-44 Remove the rear cover and fuser cover (2 of 3) 2 ENWW Product base 77

94 4. Rotate the bottom of the fuser cover away from the product, and then remove the fuser cover. Figure 5-45 Remove the rear cover and fuser cover (3 of 3) 78 Chapter 5 Removal and replacement ENWW

95 Front cover 1. Remove the right-side and left-side covers. See Side covers on page Release the lower left-side front-cover locking tab and slightly pry the lower-left corner of the front cover away from the product. Figure 5-46 Remove the front cover (1 of 4) 3. Release the lower right-side front-cover locking tab (located near the corner of the power supply) and slightly pry the lower-right corner of the front cover away from the product. Figure 5-47 Remove the front cover (2 of 4) ENWW Product base 79

96 4. Rotate the bottom of the front cover away from the product to release it. Figure 5-48 Remove the front cover (3 of 4) 5. Remove the front cover. Figure 5-49 Remove the front cover (4 of 4) 80 Chapter 5 Removal and replacement ENWW

97 Formatter CAUTION: The formatter is an ESD-sensitive device. 1. Remove the left cover. See Side covers on page Disconnect all FFCs and wire harnesses from the formatter. CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process. NOTE: The scanner assembly is shown removed in this procedure. If the scanner assembly is installed, there will be additional FFCs connected to the formatter. You do not need to remove the scanner assembly to remove the formatter. 3. Remove four screws from the formatter PCA (callout 1). Remove the formatter. Figure 5-50 Remove the formatter 1 ENWW Product base 81

98 Power supply 1. Remove the following assemblies: Right and left covers. See Side covers on page 74. Rear cover and fuser cover. See Rear cover and fuser cover on page 77. Front cover. See Front cover on page 79. Formatter. See Formatter on page Disconnect one spade connector (callout 1) and remove three screws (callout 2). Figure 5-51 Remove the power supply (1 of 7) Remove six screws (callout 3) and the sheet-metal plate (callout 4). Figure 5-52 Remove the power supply (2 of 7) Chapter 5 Removal and replacement ENWW

99 4. Disconnect three FFCs (callout 5) and six wire-harness connectors (callout 6). CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process. Figure 5-53 Remove the power supply (3 of 7) Release the ground wire from the retainer (callout 7) on the product chassis. NOTE: You might need to slightly pry up on the scanner support frame to release the wire from the retainer. Figure 5-54 Remove the power supply (4 of 7) 7 ENWW Product base 83

100 6. Release the wire harness from the retainer (callout 8) on the power supply. Figure 5-55 Remove the power supply (5 of 7) 8 7. Unclip two clips (callout 9) and remove one plastic bracket (callout 10). CAUTION: The wire harness (callout 11) attached to the bracket is not captive. Do not lose this wire harness when the bracket is removed. Figure 5-56 Remove the power supply (7 of 7) Chapter 5 Removal and replacement ENWW

101 8. Remove three screws (callout 12). Remove the power supply. Figure 5-57 Remove the power supply (7 of 7) 12 ENWW Product base 85

102 Scanner support frame 1. Remove the following assemblies: Scanner assembly. See Scanner assembly on page 60. Right and left cover. See Side covers on page 74. Print-cartridge door. See Print-cartridge door on page 76. Rear cover and fuser cover. See Rear cover and fuser cover on page 77. Front cover. See Front cover on page Remove six screws (callout 1). CAUTION: Be careful not to drop any screws into the product. NOTE: If you turn over the scanner support frame after you remove it, the two scanner cushions (callout 2) might fall out and be misplaced. Figure 5-58 Remove the scanner support frame (1 of 5) Chapter 5 Removal and replacement ENWW

103 3. Rotate the gear-drive bracket until the retainer on the gear-drive arm aligns with the opening in the bracket, and remove the bracket. Figure 5-59 Remove the scanner support frame (2 of 5) 4. Remove one screw (callout 3) and the ferrite and bracket (callout 4). CAUTION: bracket. The ferrite is not captive in the bracket and can be dislodged when you remove the Figure 5-60 Remove the scanner support frame (3 of 5) 3 4 ENWW Product base 87

104 5. Lift the scanner support frame up and off of the product. Figure 5-61 Remove the scanner support frame (4 of 5) 6. If you are removing the scanner support frame to gain access to the fuser, remove two screws (callout 5) and the chassis reinforcement bracket (callout 6). Figure 5-62 Remove the scanner support frame (5 of 5) Chapter 5 Removal and replacement ENWW

105 Laser/scanner assembly 1. Remove the following assemblies: Scanner assembly. See Scanner assembly on page 60. Right and left cover. See Side covers on page 74. Print-cartridge door. See Print-cartridge door on page 76. Rear cover and fuser cover. See Rear cover and fuser cover on page 77. Front cover. See Front cover on page 79. Scanner support frame. See Scanner support frame on page Remove three screws (callout 1) and one sheet-metal bracket (callout 2). Figure 5-63 Remove the laser/scanner (1 of 7) ENWW Product base 89

106 3. Release one tab and one spring (callout 3) and then remove right-side scanner-assembly locking lever. Figure 5-64 Remove the laser/scanner (2 of 7) 3 4. Push the shaft to the left to disengage it (you might need to release the left-side locking-lever spring), and then rotate the shaft towards the front of the product until the left-side scannerassembly locking lever is in the down position. NOTE: When the shaft is reinstalled, make sure that the locking levers and the cartridge-door button (mounted to the shaft near the right-side locking lever) are correctly positioned. Verify that the locking-lever tension springs are engaged in the slots in the chassis. Figure 5-65 Remove the laser/scanner (3 of 7) Chapter 5 Removal and replacement ENWW

107 5. Lift the laser/scanner cover up and out of the product to remove it. NOTE: When this cover is reinstalled, make sure that the slots in the lower portion of the cover (callout 4; one shown) fit over the edge of the laser/scanner mounting shelf so that the cover is secure and correctly fits inside the product. Figure 5-66 Remove the laser/scanner (4 of 7) 4 6. Disconnect one FFC (callout 5). CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process. Figure 5-67 Remove the laser/scanner assembly (5 of 7) 5 ENWW Product base 91

108 7. Remove four screws (callout 6). NOTE: These four screws are longer than most of the screws used in the product. Do not get them mixed up with screws from previously removed components. Figure 5-68 Remove the laser/scanner assembly (6 of 7) 6 8. Carefully slide the laser/scanner assembly away from the main-motor PCA bracket, and then disconnect one wire-harness connector (callout 7). Remove the laser/scanner assembly. Figure 5-69 Remove the laser/scanner assembly (7 of 7) 7 92 Chapter 5 Removal and replacement ENWW

109 Main motor 1. Remove the following assemblies: Scanner assembly. See Scanner assembly on page 60. Formatter. See Formatter on page 81. Right and left cover. See Side covers on page 74. Print-cartridge door. See Print-cartridge door on page 76. Rear cover and fuser cover. See Rear cover and fuser cover on page 77. Front cover. See Front cover on page 79. Scanner support frame. See Scanner support frame on page 86. Laser/scanner assembly. See Laser/scanner assembly on page Remove one screw (callout 1), and then carefully disconnect one wire-harness connector (callout 2). Figure 5-70 Remove the main motor (1 of 4) 1 2 ENWW Product base 93

110 3. Carefully release two tabs (callout 3) and separate the main motor PCA from the mounting bracket. Figure 5-71 Remove the main motor (2 of 4) 3 4. Remove the main-motor wire harness from the retainers on the mounting bracket (callout 4). Remove the bracket (callout 5). Figure 5-72 Remove the main motor (3 of 4) Chapter 5 Removal and replacement ENWW

111 5. Remove two screws (callout 6). Carefully slip the main-motor drive belt off of the motor shaft (callout 7), and then remove the main motor. Figure 5-73 Remove the main motor (4 of 4) 6 7 TIP: When the main motor is reinstalled, make sure that the wire harness is located toward the top of the motor so that the harness can be correctly positioned in the retainers on the motor PCA mounting bracket. When you reinstall the main-motor drive belt, make sure that it is correctly positioned on top of the spring-loaded tension idler and that it is not twisted (the grooves in the belt should face inwards when the belt is correctly positioned). Make sure that the FFC that is attached to the motor PCA is correctly positioned under the lower motor mounting bracket so that it will not interfere with the fan blade on the rear of the motor shaft. ENWW Product base 95

112 Fuser 1. Remove the following assemblies: Scanner assembly. See Scanner assembly on page 60. Right and left covers. See Side covers on page 74. Print-cartridge door. See Print-cartridge door on page 76. Rear cover and fuser cover. See Rear cover and fuser cover on page 77. Front cover. See Front cover on page 79. Formatter. See Formatter on page 81. Scanner support frame and chassis reinforcement plate. See Scanner support frame on page Remove six screws (callout 1) and the power supply sheet-metal plate (callout 2). Figure 5-74 Remove the fuser (1 of 6) Chapter 5 Removal and replacement ENWW

113 3. Disconnect two wire-harness connectors (callout 3; J102, and J552) and remove the harnesses from the retainer (callout 4). NOTE: You might need to disconnect and remove the other wire harnesses to remove the required harness from the retainer. Figure 5-75 Remove the fuser (2 of 6) Release the wire harness from the retainer near the top of the fuser (callout 5) and disconnect the ground wire (callout 6) from the back of the product. Figure 5-76 Remove the fuser (3 of 6) 5 6 ENWW Product base 97

114 5. Release one tab (callout 7) and then remove the wire-harness retainer (callout 8). Figure 5-77 Remove the fuser (4 of 6) Remove three screws (callout 9). Figure 5-78 Remove the fuser assembly (5 of 6) 9 98 Chapter 5 Removal and replacement ENWW

115 7. Lift up the right side of the fuser assembly to release it from the chassis, and then remove the fuser assembly. Figure 5-79 Remove the fuser assembly (6 of 6) NOTE: When replacing the fuser assembly, be sure to transfer the delivery-sensor PCA from the old fuser to the new one. ENWW Product base 99

116 Paper-pickup assembly 1. Remove the following assemblies: Separation pad. See Separation pad on page 66. Scanner assembly. See Scanner assembly on page 60. Transfer roller. See Transfer roller on page 73. Right and left cover. See Side covers on page 74. Print-cartridge door. See Print-cartridge door on page 76. Rear cover and fuser cover. See Rear cover and fuser cover on page 77. Front cover. See Front cover on page 79. Formatter. See Formatter on page 81. Fuser. See Fuser on page Release one tab (callout 1). Rotate the paper-pickup drive-shaft locking clip until the clip retainers align with the holes in the chassis, and then remove the clip. Figure 5-80 Remove the paper-pickup assembly (1 of 4) Chapter 5 Removal and replacement ENWW

117 3. Disconnect two wire harnesses (callout 2; J551 and J556). Figure 5-81 Remove the paper-pickup assembly (2 of 4) 2 4. Remove six screws (callout 3). Figure 5-82 Remove the paper-pickup assembly (3 of 4) 3 ENWW Product base 101

118 5. Separate the assembly from the chassis, and then remove it. Figure 5-83 Remove the paper-pickup assembly (4 of 4) 102 Chapter 5 Removal and replacement ENWW

119 Drive-gear assembly and drive belt 1. Release one tab (callout 1). Rotate the paper-pickup drive-shaft locking clip until the clip retainers align with the holes in the chassis, and then remove the clip. Figure 5-84 Remove the drive-gear assembly and drive belt (1 of 4) Carefully slip the drive belt off of the motor shaft (callout 2), and then remove four screws (callout 3). Figure 5-85 Remove the drive-gear assembly and drive belt (2 of 4). 2 3 ENWW Product base 103

120 3. Remove the drive-gear assembly. CAUTION: Not all of the gears and springs are captive when you remove the drive-gear assembly. Make sure that you do not lose any of the springs or gears when the assembly is removed. Figure 5-86 Remove the drive-gear assembly and drive belt (3 of 4). 4. Remove one gear (callout 4), and then carefully slip the drive belt (callout 5) off of the drive gear. TIP: When you reinstall the main-motor drive belt, make sure that it is correctly positioned on top of the spring-loaded tension idler and that it is not twisted (the grooves in the belt should face inwards when the belt is correctly positioned). Figure 5-87 Remove the Drive-gear assembly and drive belt (4 of 4) Chapter 5 Removal and replacement ENWW

121 6 Problem solve Problem-solving checklist Control-panel messages Clear jams Print problems Scan problems Copy problems Functional checks Service-mode functions Problem-solving tools Problem-solving diagrams Firmware updates ENWW 105

122 Problem-solving checklist Follow these steps when trying to solve a problem with the product. Step number Verification step Possible problems Solutions 1 Is the power on? No power due to failed power source, cable, switch, or fuse. 1. Verify that the product is plugged in. 2. Verify that the power cable is functional and that the power switch is on. 3. Check the power source by plugging the product directly into the wall or into a different outlet. 2 Does Ready appear in the product control panel? The control panel should function without error messages. Control panel shows an error. See Control-panel messages on page 108 for a list of common messages that will help you correct the error. 3 Do information pages print? Print a configuration page. An error message appears on the controlpanel display. Paper jams when printing. See Control-panel messages on page 108 for a list of common messages that will help you correct the error. Make sure that media that meets HP specifications. Clean the paper path. See Clean the paper path on page Does the product copy? Place the configuration page onto the flatbed scanner and make a copy. The copies should print without printquality problems. Paper jams when printing. Make sure that media that meets HP specifications. Clean the paper path. See Clean the paper path on page 29. Poor copy quality from the flatbed. 1. Clean the flatbed glass. See Clean the flatbed scanner glass on page Does the product print from the computer? Use a word-processing program to send a print job to the product. Software is not installed correctly or an error occurred during software installation. The cable is not connected correctly. An incorrect driver is selected. There is a port driver problem in Microsoft Windows. 2. If, after performing the maintenance, the problem persists, see Copy problems on page 127. Uninstall and then reinstall the product software. Verify that you are using the correct installation procedure and the correct port setting. Reconnect the cable. Select the proper driver. Uninstall and then reinstall the product software. Verify that you are using the correct installation procedure and the correct port setting. 106 Chapter 6 Problem solve ENWW

123 Step number Verification step Possible problems Solutions 6 Does the product scan to the computer? Initiate a scan from the basic desktop software at your computer. The cable is not connected correctly. Software is not installed correctly or an error occurred during software installation. Reconnect the cable. Uninstall and then reinstall the product software. Verify that you are using the correct installation procedure and the correct port setting. If the error persists, turn off the product and then turn on the product. ENWW Problem-solving checklist 107

124 Control-panel messages The majority of the control-panel messages are intended to guide the user through typical operation. The control-panel messages indicate the status of the current operation, and include a page count on the second line of the display, if appropriate. When the product is receiving print data or scanning commands, control-panel messages indicate this status. In addition, alert messages, warning messages, and critical error messages indicate situations that might require some action. Alert and warning messages Alert and warning messages appear temporarily and might require the user to acknowledge the message by pressing OK to resume or by pressing Cancel to cancel the job. With certain warnings, the job might not complete or the print quality might be affected. If the alert or warning message is related to printing and the auto-continue feature is on, the product will attempt to resume the printing job after the warning has appeared for 10 seconds without acknowledgement. Alert and warning message tables Control panel message Description Recommended action Device error Press [OK] Jam in print paper path alternates with Open door and clear jam Page too complex Press [OK] Printer jam clear paper path The product experienced an internal communication error. The product has detected a jam in the paper path. The product could not print the current page because of its complexity. The product has detected a jam in the input trays. This is a warning message only. Job output might be affected. Clear the jam from the area indicated on the product control panel, and then follow the control-panel instructions. See Clear jams on page 111. Press OK to clear the message. Allow the product to finish the job, or press Cancel to cancel the job. Clear the jam from the area indicated on the product control panel, and then follow the control panel instructions. See Clear jams on page 111. Settings cleared The product has cleared job settings. Re-enter any appropriate job settings. 108 Chapter 6 Problem solve ENWW

125 Critical error messages Critical error messages can indicate some kind of failure. Turning off and then turning on the power might fix the problem. If a critical error persists, the product might require service. Critical error message-tables Control panel message Description Recommended action 50.1 Fuser Error Turn off then on 50.2 Fuser Error Turn off then on 50.3 Fuser Error Turn off then on 50.8 Fuser Error Turn off then on 50.9 Fuser Error Turn off then on The product has experienced an internal hardware error. The product has experienced an internal hardware error. The product has experienced an internal hardware error. The product has experienced an internal hardware error. The product has experienced an internal hardware error. 1. Turn off the power by using the power switch, and then wait at least 30 seconds. 2. If a surge protector is being used, remove it. Plug the product directly into the wall socket. 3. Turn on the power and wait for the product to initialize. If the error persists, contact HP. See or the support flyer that came in the product box. Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the product to initialize. If a surge protector is being used, remove it. Plug the product directly into the wall socket. Use the power switch to turn the product on. If the error persists, contact HP. See or the support flyer that came in the product box. Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the product to initialize. If a surge protector is being used, remove it. Plug the product directly into the wall socket. Use the power switch to turn the product on. If the error persists, contact HP. See or the support flyer that came in the product box. Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the product to initialize. If a surge protector is being used, remove it. Plug the product directly into the wall socket. Use the power switch to turn the product on. If the error persists, contact HP. See or the support flyer that came in the product box. Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the product to initialize. ENWW Control-panel messages 109

126 Control panel message Description Recommended action If a surge protector is being used, remove it. Plug the product directly into the wall socket. Use the power switch to turn the product on. If the error persists, contact HP. See or the support flyer that came in the product box. 52 Scanner Error Turn off then on 54.1C Error Turn off then on Engine comm. Error The product has experienced a scanner error. The product has experienced an internal hardware error. The product has experienced an internal hardware error. Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the product to initialize. If a surge protector is being used, remove it. Plug the product directly into the wall socket. Use the power switch to turn the product on. If the error persists, contact HP. See or the support flyer that came in the product box. Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the product to initialize. If a surge protector is being used, remove it. Plug the product directly into the wall socket. Use the power switch to turn the product on. If the error persists, contact HP. See or the support flyer that came in the product box. 1. Turn off the power by using the power switch, and then wait at least 30 seconds. 2. If a surge protector is being used, remove it. Plug the product directly into the wall socket. 3. Turn on the power and wait for the product to initialize. If the error persists, contact HP. See or the support flyer that came in the product box. 110 Chapter 6 Problem solve ENWW

127 Clear jams Causes of jams Occasionally, paper or other print media can become jammed during a print job. Some causes include the following events: The input trays are loaded improperly or overfilled, or the media guides are not set properly. Media is added to or removed from an input tray during a print job or an input tray is removed from the product during a print job. The cartridge door is opened during a print job. Too many sheets have accumulated in an output area, or sheets are blocking an output area. The print media that is being used does not meet HP specifications. The media is damaged or has foreign objects attached to it, such as staples or paper clips. The environment in which the print media was stored is too humid or too dry. ENWW Clear jams 111

128 Where to look for jams Jams can occur in these locations: In input areas In output areas In the print-cartridge area Find and remove the jam by using the instructions on the following pages. If the location of the jam is not obvious, first look inside the product. Loose toner might remain in the product after a jam. This problem typically resolves itself after a few sheets have been printed. Clear jams from the input-tray areas CAUTION: Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams. Damage caused by sharp objects will not be covered by the warranty. When removing jammed media, pull the jammed media straight away from the product. Pulling jammed media out of the product at an angle can damage the product. NOTE: Depending on where the jam is located, some of the following steps might not be necessary. 1. Open the print-cartridge door. 2. Grasp the handle on the print cartridge, and then pull the cartridge straight out to remove it. 112 Chapter 6 Problem solve ENWW

129 3. With both hands, grasp the side of the media that is most visible (this includes the middle), and carefully pull it free from the product. 4. Open tray 1 and remove the media stack. 5. With both hands, grasp the side of the jammed media that is most visible (this includes the middle), and carefully pull it free from the product. ENWW Clear jams 113

130 6. Replace the print cartridge and close the print-cartridge door. 114 Chapter 6 Problem solve ENWW

131 Clear jams from the output bin CAUTION: Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams. Damage caused by sharp objects will not be covered by the warranty. With both hands, grasp the side of the jammed media that is most visible (this includes the middle), and carefully pull it free from the product. ENWW Clear jams 115

132 Clear jams from the print-cartridge area CAUTION: Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams. Damage caused by sharp objects will not be covered by the warranty. When removing jammed media, pull the jammed media straight away from the product. Pulling jammed media out of the product at an angle can damage the product. 1. Open the print-cartridge door, and remove the print cartridge. CAUTION: To prevent damage to the print cartridge, minimize its exposure to direct light. 2. With both hands, grasp the side of the jammed media that is most visible (this includes the middle), and carefully pull it free from the product. 3. Replace the print cartridge and close the print-cartridge door. 116 Chapter 6 Problem solve ENWW

133 Avoid repeated jams Verify that the input tray is not overfilled. The input tray capacity varies depending on the type of print media that you are using. Verify that the media guides are properly adjusted. Check that the input tray is securely in place. Do not add print media into the input tray while the product is printing. Use only HP-recommended media types and sizes. Do not fan media prior to loading it in a tray. To loosen the ream, hold it firmly in both hands and twist the media by rotating your hands in the opposite direction. Do not let print media stack up in the output bin. The print media type and the amount of toner used affect the output bin capacity. Check the power connection. Make sure that the power cord is firmly connected to both the product and the power supply box. Plug the power cord into a grounded power outlet. ENWW Clear jams 117

134 Print problems Print-quality problems The information in the following sections helps you identify and resolve print-quality issues. NOTE: If you are having copy problems, see Copy problems on page 127. Improve print quality Use the print-quality settings to prevent print-quality problems. Print-quality settings Print-quality settings affect how light or dark the print is on the page and the style in which the graphics are printed. You can also use the print-quality settings to optimize the print quality for a specific media type. You can change the settings in the product properties to accommodate the types of jobs that you are printing. The following settings are available, depending on the printer driver that you are using: 600 dpi FastRes 1200 NOTE: Changing the resolution can change the formatting of your text. Temporarily change print-quality settings To change the print-quality settings only for the current software program, open the properties through the Print Setup menu in the program that you are using to print. Change print-quality settings for all future jobs NOTE: For Macintosh instructions, see the user guide. For Windows 2000: 1. In the Windows system tray, click Start, select Settings, and then click Printers. 2. Right-click the product icon. 3. Click Properties (in Windows 2000, you can also click Printing Preferences). 4. Change the settings, and then click OK. For Windows XP: 1. In the Windows system tray, click Start, click Control Panel, and then click Printers and Faxes. 2. Right-click the product icon. 3. Click Properties, or click Printing Preferences. 4. Change the settings, and then click OK. 118 Chapter 6 Problem solve ENWW

135 For Windows Vista: 1. In the Windows system tray, click Start, click Control Panel, and then click Printer. 2. Right-click the product icon. 3. Click Properties, or click Printing Preferences. 4. Change the settings, and then click OK. Identify and correct print defects Use the checklist and print-quality issues charts in this section to solve print-quality problems. Print-quality checklist General print-quality problems can be solved by using the following checklist: 1. Make sure that the paper or print media that you are using meets specifications. Generally, smoother paper provides better results. 2. If you are using a special print media such as labels, transparencies, glossy, or letterhead, ensure that you have printed by type. 3. Print a configuration page at the product control panel. If the page does not print correctly, the problem is with the hardware. Contact HP. See or the support flyer that came in the product box. 4. Print a demo page at the control panel. If the page prints, the problem is with the printer driver. Try printing from another printer driver. 5. Try printing from a different program. If the page prints correctly, the problem is with the program from which you were printing. 6. Restart the computer and the product, and then try printing again. If the problem is not resolved, see General print-quality issues on page 120. ENWW Print problems 119

136 General print-quality issues The following examples depict letter-size paper that has passed through the product short-edge-first. These examples illustrate problems that would affect all of the pages that you print. The topics that follow list the typical cause and solution for each of these examples. Problem Example Cause Solution Print is light or faded. Toner specks appear. The media might not meet HP specifications. The print cartridge might be defective. If you use a non- HP print cartridge, no messages appear on the product control panel. If the whole page is light, the print density adjustment is too light or EconoMode might be turned on. The media might not meet HP specifications. The paper path might need cleaning. Use media that meets HP specifications. Replace the print cartridge. See Print cartridge on page 25. If the print cartridge is not low or empty, inspect the toner roller to see if the roller is damaged. If it is, replace the print cartridge. Adjust the print density, and disable EconoMode in the product Properties. Use media that meets HP specifications. Clean the paper path. See Clean the paper path on page 29. Dropouts appear. Vertical streaks or bands appear on the page. A single sheet of print media might be defective. The moisture content of the paper is uneven or the paper has moist spots on its surface. The paper lot is flawed. The manufacturing processes can cause some areas to reject toner. The print cartridge might be defective. The print cartridge might be defective. If you are using a non- HP print cartridge, no messages appear on the product control panel. Try reprinting the job. Try different paper, such as highquality paper that is intended for laser printers. Replace the print cartridge. See Print cartridge on page 25. If the error persists, contact HP. See LJM1120 or the support flyer that came in the product box. Replace the print cartridge. See Print cartridge on page Chapter 6 Problem solve ENWW

137 Problem Example Cause Solution The amount of background toner shading becomes unacceptable. Toner smears appear on the media. The media might not meet HP specifications. The priority input tray might be installed incorrectly. The print-density setting is too high. Very dry (low humidity) conditions can increase the amount of background shading. The print cartridge might be defective. If you are using a non- HP print cartridge, no messages appear on the product control panel. The media might not meet HP specifications. If toner smears appear on the leading edge of the paper, the media guides are dirty, or debris has accumulated in the print path. The fuser temperature might be too low. Use a different paper with a lighter basis weight. Make sure that the priority input tray is in place. Decrease the print-density setting through the print driver. This decreases the amount of background shading. Check the product environment. Replace the print cartridge. See Print cartridge on page 25. Use media that meets HP specifications. Clean the media guides and the paper path. See Clean the paper path on page 29. In the printer driver, make sure the appropriate media type is selected. The toner smears easily when touched. The product is not set to print on the type of media on which you want to print. The media might not meet HP specifications. The paper path might need cleaning. The power source might be defective. The fuser temperature might be too low. In the printer driver, select the Paper/Quality tab and set Paper Type to match the type of media on which you are printing. Print speed might be slower if you are using heavy paper. Use media that meets HP specifications. Clean the paper path. See Clean the paper path on page 29. Plug the product directly into an AC outlet instead of into a power strip. Use the archive print feature to improve toner fusing. ENWW Print problems 121

138 Problem Example Cause Solution Marks repeatedly appear at even intervals on the page. The printed page contains misformed characters. The product is not set to print on the type of media on which you want to print. Internal parts might have toner on them. The paper path might need cleaning. The print cartridge might be damaged. The media might not meet HP specifications. If characters are incorrectly formed so that they produce a wavy effect, the laser scanner might need service. In the printer driver, make sure that the appropriate media type is selected. Print speed might be slower if you are using heavy paper. The problem typically corrects itself after a few more pages. Clean the paper path. See Clean the paper path on page 29. If a repetitive mark occurs at the same spot on the page, install a new HP print cartridge. See Print cartridge on page 25. Use a different paper, such as high-quality paper that is intended for laser printers. Verify that the problem also occurs on the configuration page. If so, contact HP. See or the support flyer that came in the product box. The printed page is curled or wavy. Text or graphics are skewed on the printed page. The product is not set to print on the type of media on which you want to print. The media might have been in the input tray too long. The media might not meet HP specifications. Both high temperature and humidity can cause paper curl. The media might be loaded incorrectly or the input tray might be too full. The media might not meet HP specifications. In the printer driver, make sure the appropriate media type is selected. If the problem persists, select a media type that uses a lower fuser temperature, such as transparencies or light media. Turn over the stack of media in the tray. Also, try rotating the media 180 in the input tray. Use a different paper, such as high-quality paper that is intended for laser printers. Check the product environment. Verify that the media is loaded correctly and that the media guides are not too tight or too loose against the stack. See Install input devices on page 19. Use a different paper, such as high-quality paper that is intended for laser printers. 122 Chapter 6 Problem solve ENWW

139 Problem Example Cause Solution The printed page contains wrinkles or creases. Toner appears around the printed characters. The media might be loaded incorrectly or the input tray might be too full. The media might not meet HP specifications. Air pockets inside envelopes can cause them to wrinkle. The media might be loaded incorrectly. If large amounts of toner have scattered around the characters, the paper might have high resistivity. Turn over the stack of paper in the input tray, or try rotating the paper 180 in the input tray. Verify that the media is loaded correctly and that the media guides are not too tight or too loose against the stack. See Install input devices on page 19. Use a different paper, such as high-quality paper that is intended for laser printers. Remove the envelope, flatten it, and try printing again. Turn over the stack of paper in the tray. Use a different paper, such as high-quality paper that is intended for laser printers. An image that appears at the top of the page (in solid black) repeats farther down the page (in a gray field). Software settings might affect image printing. The order of images printed might affect printing. A power surge might have affected the product. In your software program, change the tone (darkness) of the field in which the repeated image appears. In your software program, rotate the whole page 180 to print the lighter image first. Change the order in which the images are printed. For example, have the lighter image at the top of the page, and the darker image farther down the page. If the defect occurs later in a print job, turn the product off for 10 minutes, and then turn on the product to restart the print job. ENWW Print problems 123